An extra 400 police officers have been deployed to Northern Ireland following more violence in Belfast lat night.
A police officer was struck with a petrol bomb in Belfast, but was not removed from duty.
The trouble began on Friday after officers attempted to enforce a ban on an Orange Order parade from passing through the republican Ardoyne area of the city.
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According to the PSNI more than 30 of their members have been injured in scenes they've described as "shameful and disgraceful".
Sky's Ireland correspondent David Blevins was in Belfast overnight and explains what's been happening:
